function emailCheck (emailStr,strName) {

	/* The following variable tells the rest of the function whether or not
	to verify that the address ends in a two-letter country or well-known
	TLD.  1 means check it, 0 means don't. */

	var checkTLD=1;

	/* The following is the list of known TLDs that an e-mail address must end with. */

	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

	/* The following pattern is used to check if the entered e-mail address
	fits the user@domain format.  It also is used to separate the username
	from the domain. */

	var emailPat=/^(.+)@(.+)$/;

	/* The following string represents the pattern for matching all special
	characters.  We don't want to allow special characters in the address.
	These characters include ( ) < > @ , ; : \ " . [ ] */

	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";

	/* The following string represents the range of characters allowed in a
	username or domainname.  It really states which chars aren't allowed.*/

	var validChars="\[^\\s" + specialChars + "\]";

	/* The following pattern applies if the "user" is a quoted string (in
	which case, there are no rules about which characters are allowed
	and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
	is a legal e-mail address. */

	var quotedUser="(\"[^\"]*\")";

	/* The following pattern applies for domains that are IP addresses,
	rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
	e-mail address. NOTE: The square brackets are required. */

	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

	/* The following string represents an atom (basically a series of non-special characters.) */

	var atom=validChars + '+';

	/* The following string represents one word in the typical username.
	For example, in john.doe@somewhere.com, john and doe are words.
	Basically, a word is either an atom or quoted string. */

	var word="(" + atom + "|" + quotedUser + ")";

	// The following pattern describes the structure of the user

	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

	/* The following pattern describes the structure of a normal symbolic
	domain, as opposed to ipDomainPat, shown above. */

	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

	/* Finally, let's start trying to figure out if the supplied address is valid. */

	/* Begin with the coarse pattern to simply break up user@domain into
	different pieces that are easy to analyze. */

	var matchArray=emailStr.match(emailPat);

	if (matchArray==null) {

		/* Too many/few @'s or something; basically, this address doesn't
		even fit the general mould of a valid e-mail address. */

		// alert("Your email seems incorrect (check @ and .'s)");
		// return false;
		return strName + " semble incorrect (vérifier @ et le .)";
	}
	var user=matchArray[1];
	var domain=matchArray[2];

	// Start by checking that only basic ASCII characters are in the strings (0-127).

	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			// alert("The first part of your email contains invalid characters.");
			// return false;
			return "La première partie de '" + strName + "' contient un ou des caractères invalides";
	   }
	}

	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			// alert("The last part of your email contains invalid characters.");
			// return false;
			return "La dernière partie de '" + strName + "' contient un ou des caractères invalides";
	   }
	}

	// See if "user" is valid

	if (user.match(userPat)==null) {

	// user is not valid

		// alert("The first part of your email is invalid.");
		// return false;
		return "La première partie de '" + strName + "' est invalide";
	}

	/* if the e-mail address is at an IP address (as opposed to a symbolic
	host name) make sure the IP address is valid. */

	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {

    	// this is an IP address

    	for (var i=1;i<=4;i++) {
    		if (IPArray[i]>255) {
    			// alert("Destination IP address is invalid!");
    			// return false;
    			return "L'adresse IP de destination est invalide";
    	   }
    	}

	}

	// Domain is symbolic name.  Check if it's valid.

	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
	if (domArr[i].search(atomPat)==-1) {
		// alert("The first part of your email seems to be invalid.");
		// return false;
		return "La première partie de '" + strName + "' semble invalide";
	   }
	}

	/* domain name seems valid, but now make sure that it ends in a
	known top-level domain (like com, edu, gov) or a two-letter word,
	representing country (uk, nl), and that there's a hostname preceding
	the domain or country. */

	if (checkTLD && domArr[domArr.length-1].length!=2 &&
		domArr[domArr.length-1].search(knownDomsPat)==-1) {
		// alert("The email must end in a well-known domain or two letter " + "country.");
		// return false;
		return strName + " doit se terminer par un nom de domaine connu";
	}

	// Make sure there's a host name preceding the domain.

	if (len<2) {
		// alert("your email is missing a hostname!");
		// return false;
		return strName + " : Pas de nom de domaine";
	}

	// If we've gotten this far, everything's valid!
}


function isPhoneNumber(number,message)
{

     // Check for correct phone number
     // rePhoneNumber = new RegExp(/^\([1-9]\d{2}\)\s?\d{3}\-\d{4}$/); // (123) 456-7890
     rePhoneNumber = new RegExp(/^\d{3}\-\d{3}\-\d{4}$/); // 123-456-7890

     if (!rePhoneNumber.test(number)) {
		return message;
     }

}

function form_check(){

	var message_alert = "";

	// Checking Name
	if(!document.contactform.name.value)
	{
		var message_alert = message_alert + "Le nom est vide\n";
	}

	// Checking Email
	if(!document.contactform.email.value)
	{
		var message_alert = message_alert + "Le courriel est vide\n";
	}
	else
	{
        if(emailCheck(document.contactform.email.value,'Checked'))
        {
		var message_alert = message_alert + emailCheck(document.contactform.email.value,'Votre courriel ') + "\n";
        }
    }

	// Checking Subject
	if(!document.contactform.subject.value)
	{
		var message_alert = message_alert + "L'objet est vide\n";
	}

	// Checking Details
	if(!document.contactform.details.value)
	{
		var message_alert = message_alert + "La boîte de détails est vide\n";
	}

	if(!message_alert){ // All fields and format respected: Sending the form

		document.contactform.submit();

	} else { // Some errors: Popping an alert

		alert(message_alert);

	}
}